At the time of writing (January 2022), I consider my statement accurate and I recommend you re-read the context around ‘commercially available’.

Just because you can do it, it does not make it legal.

I’m assuming the image you are referring to is the one provided under the Insider Preview program or similar. To meet the terms of that agreement, it seems generally understood you must be running a licensed version of x86 Windows on your underlying device, which is not possible on an M1.

For purchase options, I also understand that Microsoft entered a deal with Qualcomm which limited their hardware devices to the only ones currently able to legally purchase and run Windows under ARM.

I’m certain this will change, but it’s a grey area at best and no company concerned with the legality of it’s software licenses should risk breaking the license terms currently set by Microsoft.

However this article does not constitute legal advice and I recommend speaking to your Microsoft sales rep for clarification.

So for all these reasons, this method was excluded as a viable option in the article.

For further context, here are some sample articles. Many more can be found on the first page of Google:

Microsoft Says No to WOA Support on M1 Macs
https://www.thurrott.com/windows/windows-11/256250/microsoft-says-no-to-woa-support-on-m1-macs

There’s No Windows for Arm Macs Yet Because Microsoft Has Secret Exclusivity Deal With Qualcomm
https://www.macrumors.com/2021/11/22/microsoft-qualcomm-arm-windows-exclusive-deal/

Buy a Windows OEM license to gain access to Windows ARM builds in order to play Elite Dangerous
https://superuser.com/questions/1616058/buy-a-windows-oem-license-to-gain-access-to-windows-arm-builds-in-order-to-play